This is a kind of micro-poem, also called micro-poem. Miniature poetry is an independent style with strict restrictions. Therefore, we define mini-poetry as a poem within three lines, generally no more than 30 words.
Independent poetic style:
Since short poems are separated from short poems, we must treat, respect, create and discuss short poems as an independent poetic style, which has its own internal laws.
Baidu encyclopedia-three poems